(Reuters) - Houston Texans coach Gary Kubiak is alert and
upbeat after going through a battery of tests and will remain in
the hospital for the next 24 hours after collapsing at halftime
of Sunday's game, the team said on Monday.

Kubiak experienced dizziness and a light-headed feeling,
causing him to stop and kneel down as he was on his way off the
field for the intermission. The team's medical staff attended to
the coach before he was taken to a Houston hospital.

"Our primary concern is of course with Gary's health and
well-being," Texans General Manager Rick Smith said in a
statement. "Gary is alert, coherent and in good spirits. He is
continuing to be evaluated and monitored."

Houston defensive coordinator Wade Phillips took over for
the 52-year-old Kubiak in coaching the team in the second half
of its 27-24 loss to the visiting Indianapolis Colts. The Texans
led 24-3 at halftime.

"All his vital signs are good, he did not have a heart
attack," Phillips told reporters on Sunday.

There was no word yet on the team's plans for next Sunday
when Houston (2-6) visits the Phoenix Cardinals (4-4).

Kubiak was the second NFL head coach to end up in the
hospital over the weekend.

Denver Broncos coach John Fox was hospitalized in Charlotte,
North Carolina, on Saturday after feeling light-headed while
playing golf.

Fox, 58, is expected to miss several weeks as he recovers
from an aortic heart valve replacement that is being scheduled
for this week.

Broncos defensive coordinator Jack Del Rio, the former
Jacksonville Jaguars head coach, was named as interim head coach
of the Broncos (7-1) on Monday.